Johnny Depp's saddling up for a new Dior commercial ... donning a cowboy hat and a Clint Eastwood-style poncho while shooting in the desert.

Johnny Depp will preside over the manic tea party in Tim Burton's "Alice in Wonderland" as the Mad Hatter.

Johnny Depp arrived in Boston Friday using the assistance of a cane ahead of his concert — which was originally postponed due to his ankle injury.